High-draft drawing mechanism for spinning machines



July 25, 1961 QUAAS 2,994,086

HIGH-DRAFT DRAWING MECHANISM FOR SPINNING MACHINES Original Filed Sept.26, 1950 5 Sheets-Sheet 1 INVENTOR KURT (90/1/15 July 25, 1961 K. QuAAs2,994,086

HIGH-DRAFT DRAWING MECHANISM FOR SPINNING MACHINES Origmal Filed Sept.26, 1950 5 Sheets-Sheet 2 INVENTOR KURT 00/2/15 July 25, 1961 QUAAS2,994,086

HIGH-DRAFT DRAWING MECHANISM FOR SPINNING MACHINES Origmal Filed Sept.26, 1950 5 Sheets-Sheet 3 INVENTOR kum' QU/MS July 25, 1961 K. QUAAS2,994,086

HIGH-DRAFT DRAWING MECHANISM FOR. SPINNING MACHINES Origmal Fild Sept.26, 1950 5 Sheets-Sheet 4 INVENTOR mum ua/4s July 25, 1961 K. QuAAs2,994,086

HIGH-DRAFT DRAWING MECHANISM FOR SPINNING MACHINES Origmal Filed Sept.26, 1950 5 Sheets-Sheet 5 INVENTOR United States Patent Q 2,994,086HIGH-DRAFT DRAWING MECHANISM FOR SPINNING MACHINES Kurt Quaas,Denkendorf, Germany, assignor to Zellwolle-Lehrspinnerei G.m.b.H.,Denkendorf, near Esslingen (N eckar) Continuation of application Ser.No. 186,698, Sept. 26, 1950. This application Dec. 26, 1956, Ser. No.630,571

In Germany Oct. 1, 1948 Public Law 619, Aug. 23, 1954 Patent expiresOct. 1, 1968 11 Claims. (Cl. 19-131) This invention relates to ahigh-draft drawing mechanism, constructed as a double-tape drawingmechanism, for preparatory spinning and fine spinning machines, saidmechanism having an independently mounted, fixed guide rail for thebottom tape and a guide yoke, mounted on the tape cradle, for the toptape.

This application is a continuation of copending application Ser. No.186,698, filed September 26, 1950, which is now abandoned.

The best known construction of a double-tape drawing mechanism is thatof Casablancas. In a widely used modification of this construction aU-shaped yoke is inserted in the tape cradle, the top tape being guidedby the upper arm of said yoke, while the bottom tape is guided by itslower arm. The position of the yoke and of its two arms is determined toa considerable extent by the spindle of the top roller, since saidspindle engages two guide slots on both sides of the tape cradle, thelatter in its turn being pivotally mounted on the bottom roller. Byadjustment of the top and bottom tape rollers for adaptation to thevarying nature of the material to be spun (long or short fibres),variation of the relative position of the spindle of the top roller tothat of the bottom roller is unavoidable. On this account, however, theposition of the tape cradle and of the guide yoke and hence the path ofthe tapes in the drafting field are varied in a troublesome manner.

Furthermore, double-tape drawing mechanisms are known which consist of acombination of a single-tape drawing mechanism on the Le Blanc-Rothsystem, with a double-tape drawing mechanism on the Casablancas- Kasselsystem. In these drawing mechanisms, the lower tape is drawn over afixed guide rail and its tension is produced by means of a tensioningroller. A tensioning roller or a guide yoke is used for guiding the toptape on the side remote from the top tape roller.

The efiect of the known tensioning roller, which runs freely withoutbearings, is that with an inclined drafting field, it exerts a tensioneflect on the bottom tape through its own weight under the action ofgravity. Since for reasons of spinning technique, it has to have only arelatively. small diameter, it has a comparatively small weight andhence no adequate mass effect. Consequently, the tensioning roller tendsto make uncontrollable movements, which may result in an obliquepositioning of the roller and interference with the running of the tape.A further disadvantage of the tensioning roller is that it requires aninclined arrangement of the drafing field.

With the use of a guide yoke in the above-mentioned construction, saidyoke is laid freely movable on the tape cradle and is guided solely byan upper extension engaging a guide slot in the tape cradle. Due to theforce exerted by the top tape on the guide yoke, the yoke extension ispressed into the guide slot. The top tape thus determines the positionof the guide yoke. If the top tape is slack, all guiding and tensioningeffect of the yoke is lost.

It is an important object of the invention, to provide ice a double-tapedrawing mechanism of the kind described in the opening paragraph, thefixed guide rail for the bottom tape and the guide yoke for the top tapebeing connected together in a positive manner, if desired, via the tapecradle. By this means, the position of the top tape is fixed in adefinite manner. For this purpose, the fixed guide rail may have anextension constructed in the form of a three-sided prism, which in theoperative position engages a corresponding recess in the tape cradle.The arrangement may, however, be such that disengageable movablecoupling means, such as hooks and the like, are secured to the fixedguide rail and/ or the tape cradle and provide the positive connectionbetween guide rail and tape cradle. The advantage of this arrangement isthat after the disengagement of the coupling means, the tape cradle maybe pivoted upwardly, for example for the removal of laps or for cleaningpurposes. The disengageable coupling means may consist for example of apivoted coupling hook, which is rotatably secured to the fixed guiderail, and which, in the operative position, preferably engages the endof the guide yoke projecting from the tape cradle. At its free end, thecoupling hook conveniently carries a roof-shaped extension on which,after it has been pivoted upwardly, the tape cradle may be laid,preferably by means of the end of the guide yoke projecting from it. Bythis means, the spinning machine attendant has both bands free formanipulations.

It is a further object of the invention, that the distance between thefixed guide rail and the yoke is variable by the use of difierent,interchangeable guide yokes. For this purpose, the yokes may havedifferent crosssections, for example portions machined ofi above orbelow. In this case, the position of the contact surface of the twotapes is always determined by the fixed guide rail, so that the contactsurface always remains invariable in its position in the drafting field,despite its dependence upon the kind of yoke used.

In the drawings:

FIG. 1 shows a double-tape drawing mechanism according to the invention,in side View,

FIGS. 2 and 3 the tape cradle with diflferent guide yokes in each case,in front view,

FIGS. 4 and 5 on an enlarged scale the course of the tapes at thedeflecting points, using guide yokes of different constructions, in sidesection.

FIG. 6 a double-tape drawing mechanism according to the invention, inwhich the positive connection is effected by means of a coupling hook,in the operative position, in side view,

FIG. 7 the same drawing mechanism with upwardly pivoted tape cradle,likewise in side view,

FIG. 8 the coupling hook and its mounting, in plan,

FIG. 9 another constructional form of a double-tape drawing mechanism inthe operative position, in side view,

FIG. 10 the same drawing mechanism in front view, partly in section,

FIG. 11 a tape cradle, in which the disengageable connecting meansconsists of a spring member, in front view,

FIG. 12 a modified tape cradle in the upwardly pivoted position in sideview,

FIG. 13 shows a drawing mechanism according to the invention with atwo-part tape cradle and a tensioning roller holder with a tensioningroller in the operative position in side view,

FIG. 14 the same drawing mechanism, partly in vertical section on lineA-A in FIG. 13 and partly in a view from the entry side of the materialand of the tapes,

FIG. 15 the same drawing mechanism in the upwardly pivoted position inside view,

FIG. 16 a further constructional form of a double- 3 tape drawingmechanism according to the invention in side view,

FIG. 17 the same drawing mechanism in front view,

FIG. 18 another constructional form of a double-tape drawing mechanismaccording to the invention in side view, and

FIG. 19 the same drawing mechanism in front view.

In the double-tape drawing mechanism according to FIG. 1, the materialto be spun first runs between the feed rollers 1 and 2, then between thebottom tape 3 and the top tape 4, and finally between the pair ofdelivery rollers 5 and 6. The bottom tape 3 is driven by the bottom taperoller 7, is drawn at the front end of the tape cradle 8 over the fixedguide rail or guide bar 9 and is tensioned by the tensioning roller 10.The top tape 4- is driven by the bottom tape 3 and runs over the toptape roller 11, which it sets in motion, and at the end of the tapecradle 'or cage 8 over the exchangeable yoke or guide bar 12 mounted insaid cradle.

The fixed guide bar 9 has an extension 13 in the form of a three-sidedprism which engages a corresponding recess in the tape cradle 8.

On placing the cage means or tape cradle 8 on the tape bottom roller 7,the cradle must be moved in such a way that the extension 13 is able tocatch in the corresponding recess of the tape cradle 8. The tape cradle8 is thereby given a definitely fixed position relatively to the fixedguide rail 9 for the bottom tape 3. Since the tape cradle 8 is at thesame time the support for the guide yoke 12 of the top tape 4, a fixedassociation is effected between the guide rail 9 for the bottom tape 3and the guide yoke 12 for the top tape 4, which does not alter evenafter a long period of working.

The degree of curvature of the top tape 4 from the surface of contact ofthe tapes on to the guide yoke 12 is determined by the distance of thelatter from the fixed guide rail 13. In the arrangement according toFIGS. 2 and 4, a guide yoke 12 or 12a has been inserted in the tapecradle 8, the profile of said yoke by machining off the upper guidingpart is of such a shape that there is a relatively short distancebetween the guide yoke 12 or 12a and the fixed guide rail 13.Consequently, the top tape 4 is drawn around the guide yoke 12 in ashortened curve. The path on which the bottom tape 3 and top tape 4 arein contact and on which they together guide the fibres, thereby becomesrelatively long.

If, in the treatment of long-staple raw materials this path and hencethe fibre control is to be diminished, a guide yoke 12b is used which,as will be seen from FIGS. 3 and 5, inthis case has a machined-awayprofile at the bottom, such that the distance between the fixed guiderail 13 for the bottom tape and the guide yoke 12b for the top tape iscomparatively greater. Consequently, the top tape 4 is now carried in agreater curve over the guide yoke 12b, so that the path on which thebottom tape 3 and top tape 4 are in contact is shortened and hence thefibre control is also diminished.

In the double-tape drawing mechanism according to FIGS. 6 to 8, abracket 14 is secured to the fixed guide rail 9 for the bottom tape, atwo-part coupling hook 15c being pivotally mounted on the said bracketand being held under the action of a spring 16 in a position in which itengages the ends of the guide yoke 12:: projecting from the tape cradle8. By this means, the positive connection betweenthe fixed guide rail 9for the bottom tape and the guide yoke 120 for the top tape is againestablished.

If, on the occurrence of laps or of the purpose of cleaning the tapetrack, the tape cradle is to be pivoted up, the coupling hook 150 hasmerely to be turned back against the action of the spring. It has on itsupper end a roof-shaped extension 17, on which after its return into theposition of rest the ends of the guide yoke 12c, projecting from thetape cradle 8, may he placed, so that the spinning machine attendant,after pivoting up the tape cradle, has both hands free for removing anylaps or for cleaning.

In FIG. 7, the coupling hook 15c is also shown in the swung-outposition. The tape cradle is also shown in the position it assumes afterbeing pivoted up.

In FIGS. 9 and 10, the bottom tape 3 driven by the bottom tape roller 7is again drawn over a fixed guide rail 9. Said bottom tape drives thetop tape 4 and the top tape roller 11. At the deflecting point, turnedaway from the top tape roller 11, the top tape 4 runs over the guiderods 12e, which represent merely short rod ends, rigidly secured to thesides 18 of the tape cradle 8e. The tape cradle Se is mounted on thespindle 19 of the top tape roller 11. Pivoted externally to the tapecradle Se is a double-sided coupling hook 15a, which in its operativeposition engages behind a projection 20 provided on the guide rail 9 forthe bottom tape 3. By means of this coupling hook 15e a positiveconnection is established via the tape cradle 82 between the guide rods12c and the guide rail 9, thus ensuring that the distance between theguide rods 12c and the guide rail 9 and their position relatively toeach other remains always the same during operation, so thatdisturbances of the drafting process from that quarter are excluded. Inaddition the coupling hooklSe also has more particularly the effect thatany torque exerted by the spindle 19 of the top tape roller 11 on thetape cradle Se is taken up by the projection 20 secured to the guiderail 9, and consequently no rotation of the tape cradle 3e can occur.

In the tape cradle according to FIG. 11, for securing the position ofthe cradle relatively to the guide rail and more particularly also fortaking up any torque exerted on the cradle, a spring member 15] isprovided and is rigidly connected to the guide rail 9 by means of a bar21. The spring member 151' is pawl-shaped at its free end, and by meansof the pawl 22 engages a catch 23 on the side 18 of the tape cradle 8.The etfect of this arrangement is that the spring member 15 after thetape cradle 8f has been moved to the operative position is automaticallyengaged in the latched position, while when the tape cradle 8 is pivotedup, the spring member is automatically disengaged.

In FIG. 12, the tape cradle or cage means is shown in the upwardlypivoted position. The cradle sides 18 have extensions 24, which afterthe tape cradle 81 has been pivoted up, serve as stops against the topfeed roller 2.

The drawing mechanism according to FIGS. 13 to 15 shows fundamentallythe same construction as the drawing mechanisms described hereinbefore.In this case, however, the tape cradle is formed in two parts,consisting of an upper part 25 and a lower part 26. The upper part 25 ismounted on the spindle 19g of the top tape roller 11 in such a mannerthat with its plane supporting surfaces 27, embracing the spindle 19g,it touches the spindle only tangentially, thereby providing a reliableand definite support. Pivoted to the upper part 25 of the tape cradle,externally on both sides, is a coupling hook 153, which in its operativeposition engages a catch 28. The catch 28 is formed by the upper lateralextension of the vertical arm 29 of a support 36 for the bottom tape,said support being fixed to the guide rail 9. The coupling hook 15gestablishes via the upper part 25 of the tape cradle a positiveconnection between the guide yoke 12g and the guide rail 9, whichensures that the distance between the guide yoke 12g and the guide rail9 and their position relatively to each other remains always the sameduring operation, thereby also ensuring a satisfactory and uniformcarriage or guiding of the fibre material by the tapes. The couplinghook 15g furthermore prevents any torque exerted by the spindle 19g onthe upper part 25 of the tape cradle altering the position of the upperpart 25 in an undesired manner. If such a torque occurs, it is taken upby the catch 28.

The catch 28 is so arranged that it lies in the direction of theeffective tension of the top tape, so that a satisfactory positiveconnection is established by the bent end 31 of the coupling hook 15gengaging said catch. The

7 parts.

coupling hook 15g is secured in the operative position by the hook end31 abutting against the guide rail 9.

The coupling hook 15g is constructed as a double lever in such a mannerthat its upper free arm 32 serves for its actuation. The adjacent wall33 of the upper part 25 has a recess 34, so that there is no impedimentto the actuation of the arm 32.

The lower part 26 of the tape cradle is mounted on the spindle 35 of thebottom tape roller 7. It is constructed in such a manner that both thetop tape 4 and the bottom tape 3 are securely guided by it from theirentry point behind the guide rail 9. The bottom tape 3 is tensioned by atensioning roller 36 which is mounted in the slot 37 of the tensioningroller holder 38. In consequence of the satisfactory guiding of thebottom tape 3 by the lower part 26 of the tape cradle, the tensioningroller 36 does not need to have the otherwise usual collar. Forassisting uniform tape movement, the tensioning roller frame isconstructed so that its sides 39 project on all sides over the peripheryof the tensioning roller 36.

In order to limit any movement of the lower part 26 caused by the tapes3 and 4 or by its own weight, stops 40 are provided, these being formedby lateral extensions of the vertical arm 29 of the tape support 30.

The lower part 26 has, on its upper edge, a nose 41, corresponding towhich is a recess 42 on the lower edge of the upper part 25. The nose 41limits any movements of the upper part 25 after removal of the loadingsupport in the case of floating rollers or pressure rollers withoutlateral guiding, which is of particular importance in the case ofinclined drawing mechanisms.

As will be seen from FIG. 15, the upper part 25, after it has beenpivoted up by release of the coupling hook 15g, has an absolutelyreliable position. This is accomplished by the fact that the upper part25 rests with a suitable surface 43 of the side 33 on an extension 44 ofthe side 45 of the lower part 26. The effective surfaces of the top tape4 and bottom tape 3 are thus made conveniently accessible for attentionand cleaning.

In the double tape drawing mechanism according to FIGS. 16 and 17, thetape cradle is again made in two It consists of the lower part 76 andthe upper part 75. The lower part 76 is fixed by means of the screw 46to the fixed guide rail 69. The upper part 75 is mounted on the spindle1.9 of the top tape roller 11. It comprises at its other end the guideyoke 72, by means of which the top tape 4 is tensioned and guided at thedeflection point remote from the top roller 11. Both the lower cradleportion 26 and the upper part 25 are constructed so that the bottom tape3 and the top tape 4 are reliably guided, particularly where they bearon the bottom roller 7 and the top roller 11.

Fixed to a horizontal extension 47 of the fixed guide rail 69 is aU-shaped yoke 48, which embraces from below the lower part of the tapecradle, and engages with itsspring ends 22, bent to form pawls, catches23 provided on the sides of the upper cradle part 25. In this way,between the fixed guide rail 69 and the guide yoke 72 there isestablished a positive connection, by means of which the position of theguide yoke 72 relatively to the fixed guide rail 69, and hence theposition of the tapes *3 and 4 relatively to each other is fixed in anabsolute manner.

The spring ends 22 of the U-shaped yoke 48 and the catches 23 are soconstructed and arranged in detail that upon the formation of aconsiderable lap in the drafting field between the tapes 3 and 4, thepositive connection is automatically released in consequence of theforces thereby exerted on the upper part 75 of the cradle. The lattermakes a rotary movement about the spindle 19h,

' whereby the catches 23 move past the pawls 22 and release theengagement. If the laps are not so considerable as to produce automaticrelease of the connection, the special construction and arrangement ofthe connecting means has the effect of promoting the release of theconnection as a result of the forces produced by the laps when thecradle upper part 75 is pivoted by hand.

In the double-tape drawing mechanism according to FIGS. 18 and 19, asupport '80 for the bottom tape 3 is secured to the fixed guide rail 9by means of the screw 49 and supports the bottom tape 3 below thedrafting field. The U-shaped yoke 98 with the spring pawl-shaped ends 22is in this case fixed to the horizontal arm of the support 80. Thespring ends 22, together with the catches 23 on the sides of the cradleupper part 85, have the same effect as described in the foregoing withreference to the corresponding arrangement in the constructional exampleaccording to FIGS. 16 and 17.

The lower part 86 of the tape cradle carries two extensions 50 by meansof which, when it is being fixed to the machine, it is inserted betweenthe inner wall of the guide rail 79 and a part of the lateral surface ofthe U-shaped yoke 9'8.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is:

1. A tape drawing mechanism for spinning machines, comprising, incombination, a top tape and a bottom tape; a top tape roller supportingsaid top tape for movement thereon; a shaft supporting said top taperoller;

stationary guide means spaced from said top tape roller and supportingsaid bottom tape for movement thereover; a bottom cage member supportedby said guide means for laterally guiding said tapes; top cage means,for laterally guiding said top tape, pivotally mounted on said shaft onopposite sides of said top tape roller for free movement about saidshaft, said top cage means, in its operative position, resting on saidbottom cage member; a releasable lock member movably mounted on one ofsaid means and engaging the other of said means to releasably lock saidtop cage means with respect to said guide means, whereby said releasablelock member may be moved to unlock said top cage means without movingthe latter or said bottom cage member.

2. In a double tape drawing mechanism for spinning machines, incombination, a stationary fixed guide rail for supporting the bottomtape for movement thereover; a bottom cage supported on said guide railfor laterally guiding the top and bottom tapes of the drawing mechanism;a substantially U-shaped lock member fixedly mounted on said guide railand having a pair of opposite legs extending upwardly from said guiderail on opposite sides of the tapes, said legs respectively having free,springy end portions bent toward each other; a top tape rollersupporting the top tape for movement thereon; a shaft supporting saidtop tape roller; a top cage pivotally mounted on said shaft for turningmovement thereabout and having a pair of opposite side wallsrespectively engaging the top tape to laterally guide the same, saidopposite side walls respectively having projecting portions engaged bysaid free end portions of said legs of said U-shaped lock member so thatsaid top cage is releasably held by said lock member in a predeterminedposition with respect to said guide rail, whereby said top cage may beautomatically released from said bottom cage and guide rail if thematerial passing between the tapes becomes too thick.

3. A double tape'drawing mechanism for spinning machines, comprising, incombination, top and bottom tapes; a stationary fixed guide railsupporting said bottom tape for movement thereover; a bottom tapesupport fixed to said guide rail; a substantially U-shaped lock memberfixed to said tape support and having a pair of opposite legs extendingupwardly from said tape support on opposite sides of said bottom tape,said legs respectively having springy, free end portions bent towardeach other; a bottom cage mounted on said lock member and guide rail forlaterally guiding said tapes; a top tape roller supporting said top tapefor movement thereon; a shaft supporting said top tape roller; a topcage pivotally 7 mounted on said shaft for turning movement thereaboutand having a pair of opposite side walls respectively engaging said toptape to laterally guide the same and respectively having projectingportions engaged by said free end portions of said legs of said lockmember so that said top cage member is held in a predetermined positionwith respect to said guide rail and said bottom cage, whereby said topcage will automatically move away from said bottom cage when thematerial passing between said tapes becomes too thick,

4. In a double tape drawing mechanism for spinning machines, incombination, a top tape and a bottom tape; top tape roller means andbottom tape roller means located adajcent and being parallel to eachother and respectively cooperating with said top tape and bottom tape toguide the latter for movement; cage means connected to the machine bysaid bottom tape roller means and being guided by said bottom taperoller means for movement back and fourth along an unchangingpredetermined path between an operating position and a rest positionWhile remaining at all times connected to the machine, said top tapebeing at least partly located in said cage means and being laterallyguided by the latter; an upper guide bar carried by said cage means forguiding said top tape; a stationary fixed lower guide bar guiding saidbottom tape and located adjacent said upper guide bar when said cagemeans is in its operating position and distant from said upper guide barwhen said cage means is in its rest position, said lower guide bar beingparallel to said upper guide bar; and releasable lock means cooperatingwith said cage means for releasably locking the same in said operatingposition thereof to locate said upper guide bar at a predetermineddistance from said lower guide bar when said cage means is in itsoperating position.

5. In a double tape drawing mechanism for spinning machines, incombination, a top tape and a bottom tape; top tape roller means andbottom tape roller means located adjacent and being parallel to eachother and respectively cooperating with said top tape and bottom tape toguide the latter for movement; cage means connected to the machine byone of said roller means and being guided by said one roller means formovement back and forth along an unchanging predetermined path betweenan operating position and a rest position while remaining at all timesconnected to the machine, said top tape being at least partly located insaid cage means and being laterally guided by the latter; an upper guidebar carried by said cage means for guiding said top tape; a stationaryfixed lower guide bar guiding said bottom tape and located adjacent saidupper guide bar when said cage means is in its operating position anddistant from said upper guide bar when said cage means is in its restposition, said lower guide bar being parallel to said upper guide bar; apair of books turnably carried by said lower guide bar and having freehook ends, respectively, located adjacent said cage means when thelatter is in its operating position; and means carried by said cagemeans and engaging said ends of said hooks for determining the operatingposition of said cage means and for maintaining said upper guide bar ata predetermined distance from said lower guide bar when said cage meansis in its operating position.

6. In a double tape drawing mechanism for spinning machines, incombination, a top tape and a bottom tape; top tape roller means andbottom tape roller means located adjacent and being parallel to eachother and re spectively cooperating with said top tape and bottom tapeto guide the latter for movement; cage means connected to the machine byone of said roller means and being guided by said one roller means formovement back and forth along an unchanging predetermined path betweenan operating position and a rest position while remaining at all timesconnected to the machine, said top tape being at least partly located insaid cage means and being laterally guided by the latter; an upper guidebar carried by said cage means for guiding said top tape; a stationaryfixed lower guide bar guiding said bottom tape and located adjacent saidupper guide bar when said cage means is in its operating position anddistant from said upper guide bar when said cage means is in its restposition, said lower guide bar being parallel to said upper guide bar;and resilient, releasable catch means for re siliently and releasablymaintaining said cage means in said operating position thereof to locatesaid upper guide bar at a predetermined distance from said lower guidebar when said cage means is in its operating position.

7. A tape drawing mechanism for spinning machines, comprising, incombination, a top tape and a bottom tape; a top tape roller and abottom tape roller located adjacent and parallel to each other andrespectively eooperating with said top tape and bottom tape to guide thelatter for movement, said rollers having their peripheries spaced apartby the thickness of the belts only to provide a nip therebetween, topcage means for laterally guiding said top tape, a stationary fixed lowerguide bar guiding said bottom tape, an upper guide bar carried by saidcage means for guiding said top tape and located adjacent said lowerguide bar when said cage means is in its operative position, said upperguide bar being parallel to said lower guide bar, said cage means beingpivotally mounted on said machine for free movement in a circular pathabout a fixed axis between an operating position and a rest position,while remaining at all times connected to the machine, a releasable lockmemher for releasably maintaining said cage means in said operatingposition thereof to locate said upper guide bar at a predetermineddistance from said lower guide bar when said cage means is in itsoperating position, said releasable lock member being movable to unlocksaid cage means before moving the latter.

8. In a mechanism as claimed in claim 7, the top cage means beingsupported in its operative position by the stationary fixed lower guidebar.

9. In a mechanism as claimed in claim 7, said lower guide bar extendinglaterally beyond the bottom tape, the cage means having side wallsengageable with the lower guide bar when the cage means is in operativeposition, the upper guide bar being secured in said side walls.

10. A tape drawing mechanism for spinning machines, comprising, incombination, a top tape and a bottom tape; a top tape roller and abottom tape roller located adjacent and being parallel to each other andrespectively cooperating with said top tape and bottom tape to guide thelatter for movement, said rollers having their peripheries spaced apartby the thickness of the belts only to provide a nip therebetween, topcage means for laterally guiding said top tape, a lower guide barguiding said bottom tape, an upper guide bar carried by said cage meansfor guiding said top tape and located adjacent said lower guide bar whensaid cage means is in its operative position, said upper guide bar beingparallel to said lower guide bar, said cage means being pivotallymounted on said machine for free movement in a circular path about afixed axis between an operating position and a rest position, whileremaining at all times connected to the machine, said upper guide barmoving at all times in a circular are at a constant distance from saidfixed axis.

11. In a mechanism as claimed in claim 10 the fixed axis on which thecage means is pivotally mounted being coincident With the axis of thetop tape roller.

(References on following page) 9 References Cited in the file of thispatent UNITED STATES PATENTS Wrigley June 16, 1903 Johnson Nov. 8, 19215 Honda Nov. 23, 1937 Orrell Jan. 17, 1939 Honda May 30, 1939 10 HondaDec. 5, 1939 Hess July 11, 1944 Naegeli May 23, 1950 Hohloch Apr. 20,1954 FOREIGN PATENTS Great Britain Oct. 29, 1931 France June 6, 1951

